I would say that if you have a particular TV event that would be a big disappointment to miss, then you should run your VCR (with its own timers) at the same time, on the output of the 501. (For something that you want to have on tape anyway, you'll be doing that anyway.)
However, I have not had a problem recently, and it is entirely possible that the software is now mature enough that - as a new user - you won't ever see the problems that "early adopters" had.
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